Image forming apparatus

An imaging device and image technology, applied in the direction of instruments, electrical recording process equipment using charge patterns, optics, etc., can solve problems such as great changes

Inactive Publication Date: 2006-09-13
SHARP KK
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0031] Also, even assuming that the timing of the display prompting that the toner cartridge should be replaced is accurate, the period of time between the display prompting that the toner cartridge should be replaced and the time when the toner supply is actually exhausted often varies greatly depending on the operating conditions of the device. Variety

Method used

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  • Image forming apparatus
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Embodiment Construction

[0056] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to help understanding of the present invention. The following examples are specific examples of the present invention, which are not intended to limit the technical scope of the present invention.

[0057] figure 1 is a control block diagram showing image processing in the image forming apparatus (digital electrophotographic apparatus) to which the present invention is applied. Such as figure 1As shown, the digital electronic photographing device includes an input signal processing section 10, a region separation processing section 20, a color correction / black generation processing section 30, a scaling processing section 40, a spatial filtering processing section 50, and a halftone correction processing section 60 , a pixel counting section 70 , a toner consumption calculation section 81 , an average toner consumption calculation section 82 , a remaining ...

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Abstract

In one embodiment, a pixel count portion that accumulates pixel count values for each pixel obtained by multiplying the input signal levels of a multilevel image by weighting coefficients, a toner consumption calculating portion that calculates toner consumption of each color from the pixel count sum value, an average toner consumption calculating portion that calculates average toner consumption per page based on the total amount of toner consumption and total number of pages printed subsequent to shipment, and a remaining toner calculating portion that calculates the amount of remaining toner from the total toner consumption based on the sum total of divided regions since the most recent time that a toner cartridge was exchanged, are provided, and a control portion executes a toner saving mode when the amount of remaining toner calculated by the remaining toner calculating portion reaches not more than a predetermined value set in advance.

Description

[0001] This application claims priority from Patent Application No. 2005-65584 filed in Japan on March 9, 2005, the entire contents of which are hereby incorporated by reference. technical field [0002] The present invention relates to an image forming apparatus such as a copier, a laser printer, a facsimile apparatus, etc., using an electrophotographic system in which image processing and correction processing of image information are performed digitally. Background technique [0003] Generally, with image processing in an electrophotographic device such as a digital copier, a digital image signal input from an image input device such as a scanner is subjected to processes such as input signal processing, region separation processing, color correction processing, etc. , black generation processing, zooming processing, and other digital signal processing, and then filtering processing using a spatial filter, and halftone correction processing are performed, and then output a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03G15/00G03G15/08
CPCG03G15/556G03G15/553
Inventor 河野浩史今川真司永山胜浩臼井孝
Owner SHARP KK
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